“Behavior detection officers are screening passengers
for involuntary physical and physiological reactions that people
exhibit in response to a fear of being discovered. TSA recognizes that
an individual exhibiting some of these behaviors does not automatically
mean a person has terrorist or criminal intent. Individuals exhibiting
specific observable behaviors may be referred for additional screening
at the checkpoint to include a handwanding, limited pat down and
physical inspection of one’s carry-on baggage.”